(informal) Period and feeling of depressiveness after giving birth; a less severe form of postnatal depression.

(informal) Blue eyes.

(music) A style of music combining elements of jazz and blues, with syncopated rhythms and a strong backbeat, originating among African Americans in the 1940s. / (Cockney rhyming slang) shoes

(idiomatic, informal) To be depressed; to have low morale; to feel sad.

(music) A form of blues originating in the Mississippi Delta region of the United States, generally featuring minimal instrumentation and song structure.

(music) A minor hexatonic scale originating in the American musical genre blues, consisting of tonic, minor third, fourth, diminished fifth, fifth, and minor seventh, in which notes, particularly the minor third, fourth, diminished fifth, and minor seventh may be bent. It can also be called the minor blues scale when distinguishing it from its only other functional mode the major blues scale.

(chiefly UK, informal, law enforcement) The flashing blue lights and (originally) two-tone siren of a police vehicle.

(music) A type of boogie-woogie blues music influenced by big band swing, typically performed by a seven-piece combo and characterized by use of horns, shuffle rhythm, group singing during the choruses and raunchy lyrics.

plural of Prussian blue

plural of navy blue